Security Clearance Information

This event is classified at the SECRET//NOFORN level. All attendees must hold the appropriate clearance to attend.

Security clearance verification is the initial step in the registration process for PSTS-21.  All attendees are required to be U.S. citizens.  No non-U.S. citizen personnel will be permitted to attend or participate in the symposium.  All attendees are required to submit a Visit Request form to the JHU/APL Visitor Control Office via APL’s  SMO Code: 888984 or fax (240-228-6400) by Friday, October 15, 2021.  Once the Visit Request is received, the Security Team will validate the clearance in the Department of Defense (DoD) administered Defense Information System for Security (DISS).  A copy of the visit requests and DISS validation will be maintained.  If necessary, a spreadsheet containing all required security clearance information will be provided to the OUSD(AT&L) Deputy Director for Security to reflect proper certification of attendees, participants, and support personnel involved with PSTS-21.

Recommended Method of Submission:
DISS using SMO Code: 888984
POC: Renata Casiel or PSTS-21.
Phone: (703) 247-2561

Symposium Address:
The Johns Hopkins University/Applied Physics Laboratory
11100 Johns Hopkins Road
Laurel, MD 20723-6099
Attention: Visitor Control

Do not have access to DISS?
Please email Renata Casiel at for a PDF version of the security form. Fax this form directly to the JHU/APL Security Office 443-778-6400.

If you hold a Department of Energy (DOE) Q, or L clearance, JHU/APL requires that the visit request be submitted on the DOE 5631.20 form.
For security questions, call JHU/APL Visitor Control Directly: (240) 228-5661